I agree with the others, really no difference. Go with whoever has a better time schedule to fit your needs and hopefully a better price. We booked Jet Blue for July but really played with our departure and arrival dates to get the best fare. I used Jet Blue solely because I had the points. Not Sxm but we do what Kim does going back and forth to NY from Florida -- fly to NY on Jet Blue and back to Florida on Delta -- primarily because of the flight times. Hope you find something reasonable.